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Under-Couch Toy Blocker

My dog Anna kept losing her toys under the couch, so I designed these to close the gap. Each section presses in gently between the floor and the front edge of the couch and helps stop toys from rolling under. A section is 9 in long, and a connector joins them, so you can connect as many as you need to span the front of your couch.

Two gray vented toy blocker sections under the front edge of a blue couch, with a blue dog ball stopped against them on the rug

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Four parts: the section, a standard connector, a wide connector and a short test piece. Each has its own 3MF with the tested profile, one 3MF carries all four plates, and the STLs are in there for bringing your own.

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The 3MF is the faster path — open it and slice. A full print & fit guide is attached to the Creality listing.

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Print & Fit Guide

The same guide attached to the model listings, hosted here so you can read it before you print — PDF · 4 pages · 805 KB

Open the Guide

Before You Slice

Check Your Fit

Measure the gap under your couch first. Each section is 229 mm (9 in) long, 88 mm (about 3.5 in) tall and 76 mm (3 in) deep at the base. It is made to compress a little, so it suits a gap slightly under its 88 mm height.

Print the test piece before a full section. It is a 40 mm slice of a section and takes about an hour and a half. Slide it under the couch to check the fit. If your gap is different, scale the section in your slicer until the test piece fits, then scale the connector by the same factor so the two still slide together.

A section prints standing on end, so your printer needs 229 mm of Z height.

What Makes It Work

Closes the Gap, Not the Airflow

A solid strip would stop the toys too. These are sprung so they hold themselves in place, and vented so the space under the couch still breathes.

Two toy blocker sections and a connector lying on a black desk
Gentle Spring Fit
The curved face flexes, so a section compresses lightly between the floor and the front edge of the couch and stays where you put it. Nothing is screwed or stuck to the furniture.
Close view of two joined toy blocker sections showing the rows of diamond-shaped vents
Diamond Vents
The cutouts let air keep moving under the couch, and they give a floor HVAC vent under there an outlet instead of sealing it in.
A hand sliding the connector into the bottom of one toy blocker section
Slide-In Connector
A connector slides into the bottom of two sections and joins them into one run. The standard connector butts the sections together; the wide one spaces them 1 in apart, to save a little filament.
The underside of a toy blocker section with a stick-on rubber foot at each corner, beside the sheet the feet came from
Optional Rubber Feet
I added small stick-on rubber feet (not included) to help keep it from sliding on the floor. For a firmer hold you could put hook-and-loop tape under the couch and mount a section upside down, with its base against the couch — I have not needed it.

Print Settings

Slice It Right

These are the settings baked into the 3MFs, sliced for a Creality Hi with a 0.4 mm nozzle. Open one in Creality Print or any slicer that reads 3MF projects and it is ready to go.

One 9 in section is 9 h 14 m and 157 g — 52.63 m of filament, roughly $2.35 in material. The standard connector is 52 m and 21 g, the wide connector 1 h 2 m and 30 g, and the test piece 1 h 29 m and 30 g.

Keep the brim on the section. It is 229 mm tall on a thin footprint, and the 8 mm brim is what holds it to the plate for nine hours.

PLA or PET-G? Mine are PLA. PET-G is a bit more flexible, and it handles warm air better if a heating vent blows under your couch in winter.

Supports
None
Layer Height
0.20 mm
Walls
5
Top / Bottom
5 / 3
Infill
10% Gyroid
Brim
8 mm, outer only
Material
PLA · 220 °C / 65 °C
One Section
229 × 88 × 76 mm · 9h 14m
Slice data: one 9 in section is 9 h 14 m and 157 g; the two connectors and the test piece are about an hour each

More models and tested slicer settings on my Creality Cloud profile.

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Released under CC BY-NC-ND 4.0 — free for personal use, credit appreciated, no commercial use or derivatives.